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Give your agent a real browser.

FSB ships a polished OpenClaw skill plus a 50+ tool MCP surface that any agent runtime can drive. Click, type, orchestrate across tabs, fill vault credentials, read live page state, all from one prompt, in the user's actual Chrome.

Install on ClawHub View on GitHub

Meet the FSB Skill

The canonical OpenClaw onboarding path for FSB. Loads cleanly into a fresh OpenClaw, runs the full diagnostic flow, and installs the bridge for any other MCP host on your machine.

Doctor first protocol

Runs npx -y fsb-mcp-server doctor, parses the failing layer (one of package, bridge, extension, active-tab, content-script, config), and prints the next step recommendation. Exit code surfaces failure to the host.

Stdio config printer

Emits the canonical OpenClaw stdio block to paste into your MCP config. The block stays parity locked with mcp/src/install.ts so the printer never drifts from the rest of the installer.

Consent gated host install

Detects other MCP hosts (Claude Desktop, Cursor, Codex, etc.) and asks y/n per host before installing. Never --all without consent. Never auto writes the OpenClaw config.

Why FSB MCP is powerful

Browser automation usually means a headless instance you cannot see. FSB drives the user's actual Chrome session, and the MCP surface is built around four hard requirements: precision, observability, safety, and concurrency.

50+

MCP tools, one surface

Read, click, type, navigate, vault, observe. All typed. All agent-scoped. One surface, no glue code.

N agents

Multi agent identity and tab ownership

Server-minted agent_id per session. Tabs owned per agent. Cross-agent calls fail loud with TAB_NOT_OWNED. Cap 1-64 (default 8), AGENT_CAP_REACHED when full. No focus stealing.

0 leaks

Vault boundary, by design

Passwords and cards resolve inside the extension's encrypted store via fill_credential and use_payment_method. Never in chat. Never in args. requires.env is mandatory empty.

Live

Real Chrome, real session

Your cookies. Your extensions. Your saved state. change_report streams mutations on every action — no extra read_page round-trip.

Install in 3 Steps

Get from a clean machine to a green doctor in under five minutes.

  1. 1

    Install the FSB Chrome extension

    Primary path. Paste this Chrome Web Store URL into Chrome's address bar:

    https://chromewebstore.google.com/detail/badgafnfchcihdfnjneklogedcdkmjfk

    Fallback path. Download the latest .zip from GitHub Releases, then load unpacked at chrome://extensions with Developer mode on.

  2. 2

    Install the FSB MCP server config

    Print the canonical OpenClaw stdio block and paste it into your MCP host config:

    node scripts/print-stdio.mjs

    Or use the FSB CLI directly. Discover supported hosts on your machine:

    npx -y fsb-mcp-server install --list

    Then run the installer for one host, for example:

    npx -y fsb-mcp-server install --claude-desktop
  3. 3

    Verify with the doctor

    Run the six layer diagnostic. Expect [OK] on every layer.

    node scripts/doctor.mjs

    If any layer fails, the doctor prints a one line next step. The full recovery table lives in USAGE.md inside the skill.

Where FSB earns its keep

The recurring browser work. The boring, repetitive stuff that vision-based agents struggle with on logged-in sites. FSB runs in the user's real Chrome, so cookies, sessions, MFA state, and saved logins are already there.

Inbox triage

>Open Gmail, label everything from billing as finance, draft replies to support threads using yesterday's tone, and flag anything urgent.

Support replies

>In Zendesk, draft answers to open tickets about pricing, order status, and shipping using the help center as ground truth.

Logged-in dashboards

>Pull yesterday's revenue, signups, and refund count from the analytics dashboard and post a one paragraph summary.

Lead monitoring

>Score new LinkedIn connection requests against the ICP, draft outreach for the top three, and skip the rest.

Small-business ops

>Categorize today's invoices in the POS as supplies vs. retail, extract shipping line items, and flag any vendor over last month's average.

These run as manual-mode tool calls. Autopilot (run_task) only fires when the user explicitly delegates the whole task -- "use FSB autopilot", "delegate this", or names run_task directly. Manual mode is the default for everything else.

Ship a real browser to your agent today.

Free, open source, BYO model keys. Works with OpenClaw, Claude, Codex, Cursor, Windsurf, and any MCP host that speaks the OpenAI tool protocol.

Install on ClawHub Read the skill source Watch the demos